Pulp-molding machine



Jan. 13, 1931. M. P. CHAPLIN PULP MOLDING MACHINE- 5 Sheets-Sheet 1 Filed Oct. 11, 1926 m2 as:

INVENTOR Mex-16E Chaplin; BY Y fl 'z' I ATTOR Y5.

Jan. 13, 1931.

M. P. CHAPLIN PULP MOLDING MACHINE 1926 5 Sheets-Sheet 2 Filed 001:. ll

F? pr m WNW @M Q M 5%.

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Jan. 13, 1931. CHAPLIN 1,788,944-

PULP MOLDING MACHINE Filed Oct. 11, 1926 5 Sheets-Sheet a INVENTOR ATTORN Y5.

- McrZeEChwpLi/rv 15 stantially on line 2-2 of Fig. 1

Patented Jan. 13,1931

YUNITED STATES PATENT; OFFICE.

MERLE P. OHAPLIN, WHITE PLAINS, NEW IENTS, TO FIDELITY TRUST COMPANY IPOBATION OI MAINE Fun-momma uacnmn Application filed October 11', 1920. Serial No. 140,715.

This invention relates to chines.

More particularly stated, the invention relates to a machine for forming and COIltlIlll: 5 ously producing articles formed of pulp or other plastic material, such, for instance, as plates 'or other dis hes, cups, mats, boxes, or other desired articles.

One of the objects of the invention is to pulp molding mam provide a machine of the character specified that will be simple, compact and rigid in construction and will effectively perform the desired functions.

Another object of the invention is to provide a pulp forming machine so constructed and arranged that a large proportion of the liquid or moisture will be removed from the pulp before the forming die and'the article formed thereon reaches the compression 2o mechanism.

Another object of the invention is to ro-' vide a machine of the character describe so constructed and arranged that none ofthe pivoted, rotatable or movable parts thereof re-' q il iring lubrication will come-in contact with t.

e wet pulp solution. Another object of the invention is to provide a pulp forming machine of the -char'ac ter specified so constructed that the forming dies will be firmly supported during the application of the compression dies theretoand will effectively withstand the pressure.

. Another object ofthe invention is to pro vide a machine of the character specified so designed that the transfer of the molded compression die will be articles'from the facilitated.

Further objects of the invention will appear from the following specification taken 40 in connection with the drawings, which form a part of this application, and in which Fig. 1 is a top plan view of a machine con structed in accordance with the invention Fig. 2 is a sectional elevation taken sub- Fig. 3 is a sectional elevatioii taken sub stantially on line 3-3 of Fig. 2;

Fig. 4 is a sectional elevationtaken substan tially on line 4-4 of Fig.2;

Fig. 5 is an enlarged sectional elevation illustrating the details of the transfer mechanism for transferring the molded .articles from the compression dies to the conveyor belt;

showing the details 0 the connections to the compression dies; v

Figs. 7 and" 8 are elevational views taken Fig. 6 is an enlarged sectionalelevation YORK, assrenon, BY unsun Assnm- TRUSTEE, or ron'rmm), mum, a con at right angles to each other showing on an enlarged scale the cam control means for the transfer mechanism;

Fig. 9 is an elevational view showing the guide rails for the cam control means for the transfer mechanism;

' Fig. 10 is a detailelevation showing a porqreceive, and form the article on the die,

compression dies adapted to register at a pnedetermined point in the revolution of the forming dies with the forming diesv and to compress the article therebetween, and transfer mechanisms ada pressed "and forme pression dies to transfer the articleoto a carrier or conveyor.

ted to receive the com- Th forming dies are so constructed that a 3 large proportion of the moisture from the molded article on the forming die will be .ex-

tracted :prior to the operation of the compression dies and the forming dies and compre'ssion dies are so relatively 'arrangedthat the I forming dies will be firmly and rigidly supported during-the operation of the compression dies.

The transfer mechanism and compression dies are so arranged that gravity will assist in transferring the molded articles from I they article from theeomcompression dies'to the transfer mechanism.

Furthermore, the transfer mechanism vis rotated through from receivin to-dis charging pos tion so that gravity will againassist in discharging the devices from the transfer mechanism to the carrier 'or conveyor.

Various novel features are incorporated in the forming mechanism, compression mechanism and transfer mechanism and these will be brought out in more detail in the following description.

Pulp forming dies and mounting therefor In the particular embodiment of the invention illustrated, the mechanism is mounted on a base 20, having cross frame members 21 and 22. A frame work consisting of two pairs of uprights, namely 23 and 24, is mounted on the cross frame members, the uprights being connected at their upper ends by a frame 25.

The frame member 21 has mounted thereon a bearing 26 for su porting one end of a shaft 27 A similar Bearing 28 is carried by the frame member 22 and supports the other end of the shaft 27 The shaft 27 may be driven from any suitable source of power asby a motor M, belt drive 28A and clutch member 29A fixed to the shaft and clutch member 29B loose on the shaft. A clutch shaft lever 29C controls the clutch.

A hub 30 is mounted on the shaft 27 to rotate therewith and has connected thereto 30 radially extending, hollow arms 31 to the outer ends of which are secured forming dies 32. Each of the hollow arms terminates in a chamber 33 over which there is secured the perforated forming die 32. A mesh screen 34 formed of wire is preferably secured over the die 32 b means of a ring 35.

The orming dies are so shaped or of such contour as to produce an article of the desired shape and while thedib is immersed in the solution, means is provided. for exhausting the air in the hollow arms 31 and chambers 33, thus causing the liquid material in the vat to pass through the screens and perforations in the die, the solid matter being deposited on the screen in the form of a thin layer shaped in conformity with the shape of the die. The period of time during which the die remains submerged in the solution and the amount of suction applied to the arms 31 will determine the thiclmess of the article formed on the die.

Suction is applied to the arms 31 in the following manner. The hub 30 has 'formed therein a plurality of arcuate conduits 40 adapted to communicate with the inner ends of the arm 31 and'with a suction chamber 41 formed in a stationary control casing 42 mounted on the shaft 27 and abutting against one side of the hub 30. The cham er 41 is exhaustedin any suitable manner through a conduit 43 which communicates with the chamber 41 through a passage 44 formed in an enlarged portion of the journal 26 for the;

shaft 27. It will be evident that the arms 31 after maaeea they rise in their rotation above the hori- It will be evident that when the clutch lever 290 is shifted to open the clutch 29B, the valve 48' will be closed, thus shutting off the suction from the forming dies.

In order to automatically shift the clutch lever when the motor M is stopped, the fol-- lowing mechanism is provided. The link 49 is extended beyond the pivotal connection of the link to lever 29C and is slotted at 202. The link extension is connected by a spring 201 and rod or wire 200 to the frame 21.

.The extension of the link has secured thereto an armature 203 of an electro-magnet or solenoid 210. The electro-magnet is connected in the motor circuit in parallel, one conductor 204 leading to the magnet winding being connected to motor main 211 and the other magnet lead Wire 205 being connected to wire 212 leading from the switch contact 114 to the motor.

Thus when the motor circuit is opened, either by opening the main leads or the circuit through the control switch contacts 113, 114, the electro-magnet coil will be de-energized releasing the armature 203 and permitting the spring 201 to shift link 49 and close the valve 48' thus cutting off the suction from the formin dies.

It will magnet when energized has sufficient pulling force to overcome the action of spring 201 but the spring will shift the link 49 when the magnet is de-energized.

In order to discharge the molded articles from the forming. dies 32 onto the compression dies, compressed air is introduced into the chambers 33 at a suitable period in the cycle of operation of the machine. This air enters the chambers 33 through conduits 45 which communicate with a compressed air chamber 46 formed in the control casing 42. A conduit 47 conducts the compressed air from any suitable source to the chamber 46.

From the foregoing description, it will be seen that as the forming dies pass through the vat, they will receive a thin layer of pulp or plastic material which will adhere to the dies by reason of the suction created in back of the dies. This pulp will be carried around the dies, the moisture bein drained therefrom partially by gravity and e understood that the electro-'- mean partially by the suction. When theforming 'es register with the compression dies in the manner hereinafter set forth, compressed air is introduced behind the forming dies,

thus assisting in drying the article on the formin from the forming dies to the compression dies. In order to prevent any liquid from collecting in the conduit 45, a small open ing 48 'is formed in the wall-between the suction passage 40 and the conduit 45.

Compression mechanism The compression mechanism comprises a plurality of compression dies conforming in shape to the shape of the forming dies; that is, the inner surface of the compression die conforms .in shape to the outer surface of the forming die so that the article molded on the forming die can be compressed be? tween the two dies without changing its contour.. The compression dies,are carried by a wheel-comprising a hub 51 aflixed to the shaft 27 and having radially extending therefrom a plurality of arms 52. To the outer end ofeach of the arms 52 there is swiveled a hollow shaft 53, this shaft being mounted in bearings 54. One or more shims A is interposed, if necessary, between thearms 52 and the bearings54 for the purpose of properly positioning the compression dies relative to the forming dies. An L-shaped bracket or casing55 is secured to the central portion of the hollow shaft 53 and a conduit 56 is adjustably swiveled and clamped in the bracket or casing 55. This' conduit communicates with the interior of the hollow shaft 53 through a connecting conduit 57, an

, conduits 56- intermediate bracket opening 58 in the hollow shaft 53 and an opening 59 in the conduit .56.

The compression die 50.is mounted in a compressionhead 60 secured as shown at 61 to the outer end of the conduit 56. An antifriction roller 62vis mounted on each of the the casing or 55 and the compression head 60. A pair of guide rails 65 and 66 are mounted above andbelow the rollers 62 and are so shaped as to swing the compression dies,

compression head andv coacting parts from the position shown at the top; in Fig. 2 to the position shown at thehottom in Fig. 2.

The rails are provided with a depression 67 at thebottom thereof for guiding the com,- pression dies into, proper coacting relation with respect to the transfer heads and quickly removing them from the transfer heads.

A slight" pressure is created behind the compression dies 50 during the compression operation, the compressed air-preferably being heated or dry, thus assisting in drying the article and alsopreventing the adhering of the article to the' die byinterposing a partial film of air between the compression and the articl'formed. This compressed dies and in discharging the article" 'Figs. 2 and 3. T is mounted in the rame 25. This frame is chains 99'. The chains exten bracket 101 secured air is introduced into one end of thehollow shaft 53 through a coupling 70 which receives the air from the conduit 71 which'in turn communicates with a compression chamber 72 in the hub 51. The compression chamber 72 in turn communicates with a compression chamber 73 in a control casing 74 mounted on the shaft 27 and preferably spring-pressed by a spring 75 against the hub 51. The control cas'in 74 is prevented from turning on the shaft by a pivotal connection 76 to a lug 77 .formed on a fixed bearin member 78. v

he opposite end of the shaft 53 communicates with a coupling 80 which in turn is connected by 'a conduit 81 to an exhaust chamber 82 in the hub 51. This chamber registers with an exhaust chamber 83 in the control casing 74.

The couplings 70 an'd 80 have a swivel connection with the shaft 53 and are held in contact with the ends of the shaft by means I exerted in back of the compression dies during the compression operatiombut suction w1ll be. created 1n back of the compression dles after the compression 0perat1on is com- Thus,

pleted and during the. movement of the compressiondies from. the position shown at the top in Fig. 2 to the position shown at-the bottom in Fig.2. When the compression. dies reach a position above the transfer device, thesurtion behind the die is released and a slight pressure assists gravity in the transfer.- i

.The compressing force is exerted on the? compression dies in the following manner, attention being particularly directed to l? compression mechanism provided with a pair of threaded bosses 85' and 86 which receive externally threaded nuts 87 and 88. The nuts are provided with central openings therein through which extend threaded rods or studs 89 and 90'. Nuts '91 and 92 are mounted. on the outer ends. of

these studs and the inner ends have secured thereto U -Shaped yokes 93 and 94. A block 95 is mounted on studs 96 secured to the depending legs of yokesl93 and94 and isprovided with a hard bearing surface 97 adapted to be engaged, by rollers 9 mounted on around the block 95 and are engaged and driven by asprocket wheel 100 mounted in an ddju'stable to the block 95. Bracket .101 is guided by a and slot connection 110, 111 to frame 25. The sprocket shaft 102 extends laterally and may be driven from same rate of speed as the rate of travel of.

the forming and compression dies.

The block 95 in addition to being carried by the yokes 93 and 94 is guided by a link 103 which connects one of the studs 96 to depending lugs 10 1 carried by the frame 25.

Downward pressure is exerted on the block 95 and through the rollers 98 on the compression die by means of springs 106 and 107 mounted on the studs or rods 89 and 90 and seating at one end against the nuts 87 and 88 and at the other end against washers 108 which in turn abut against the upper surfaces of the U-shaped members 93 and 94. The pressure of the springs can be adjusted by adjusting the nuts 91 and 92 on the studs 89 and 90 and by raising or lowering the nuts 87 and 88 in the bosses and 86.

In mechanism of this character, a reasonable uniformity in thickness of the 'product or article should be maintained. For this purpose, means is provided for automatically stopping the mechanism when the article is too thick. This means consists, of a lever 112 pivoted on a fixed pivot and having an end engageable with the upper end of one of the bolts 89 and when the thickness of the article compressed passes the desired limit. The other end of the lever carries a contact 113, normally spring-pressed into engagement with an adjustable contact 114 in the circuit of the driving motor M. When the lever 112 is tilted, it will open a switch 111 in the circuit. of the driving motor and stop the machine.

The compression mechanism operates as follows. On referring to the drawings, it will be seen that for each forming die there is a corresponding compression die, these dies being so arranged that when each forming die reaches the position shown inFig. 2, there will be a compression die juxtaposed thereon and adapted to coact therewith.

The movement of the compression dies during the rotation of the hub and wheel by which they are carried is controlled by the guide rails 65 and 66. When a compression die is in the position shown at the top of Fig. 2, compressed air enters the compression head 60 through the conduit 71, coupling 70, hollow shaft 53, passage 57 and conduit 56.

During the rotation of the forming .die and corresponding compression die, the molded article between these dies will be compressed by pressure derived from the spring-pressed block and rollers 98. As these dies leave this compression mechanism, they are separated and a vacuum is created behind the compression dies and in the compression chamber since at this point in the cycle of operation, the Vacuum chamber 83 in the casing 7 4 will communicate with the vacuum chamber 82 in the hub 51 and this suction is communicated to the hollow shaft 53 through the conduit 81 and coupling 80. The hollow shaft 53 communicates with the compression chamber 60 in the manner just described.

At this period in the cycleof operation also, compressed air is introduced behind the forming die 32 simultaneously with the suction created behind the compression die. Thus the molded article is transferred from the forming die to the compression die and Mechanism for transferring articles from compression die to conveyor cured to the shaft but is secured to a sleeve 119 which in turn is keyed to the shaft as shown at 120 by the following connection; Sleeve 119 has formed thereon a laterally extending flange 121 having arcuate slots 122 therein and the gear 118 is secured around the sleeve and to the flange by means of bolts 123 which extend through the slots 122 and engage the gear 118. By loosening the bolts and sliding the gear longitudinally on the sleeve, the gear 118 can be moved out of mesh with the gear 117 and by rotating the gears 117 and 118 relative to each other and securing thegear 118 by means of the bolts 123 in rotated position and in mesh with the gear 117, the timing of the'comres'sion dies and transfer mechanism can regulated.

v The hub 115 is provided with an enlarged lower end 125- having radially disposed openings or chambers 126 therein. These openings form chambers which communicate with the transfer mechanism hereinafter described and alternately form suction and compression chambers.

A stationary control casing 127 is mounted around-the shaft 116 and disposed below the enlarged portion 125 of the hub 115. This casing has a vacuum chamber .130 which is connected by a conduit 131 to a vacuum pump and also has a compression chamber tion 125 of 132 connected by a conduit 133 to a compres- 135 formed in the upper surface of t e control casing 127 and as shown in Fig. 12. the

grooves 135 are graduated in length. Each of the radial openings or chambers 126 has a port 138 communicating with one of the grooves 135 during apart of the revolution of the hub 115 around the shaft 116.

The control casing 127 also has formed thereon a beyond the ends of the concentric grooves 135 and communicating with the compressed air chamber 132. Each of th radial openings 126 has a port 140 adapte to communicate with one of the ports 139 in the casing 127 and to establish communication between the chamber or opening 126 and the compression chamber. The grooves 135 and the ports 139 and also the ports 138 and 140 are so arranged that the transfer arms here inafter described will have an exhaust connectlon or vacuum connection when in the position shown in Fig. 2 and during the ma]or portion of the movement of the arms from receiving to discharging position, but

7 w11l have compressed air. forced therethrough when the arms are in theposition shown at the right in Fig. 2' or, in other words, in a position to discharge the molded articles therefro The control casing 127 has a s herical bearing surface 141 at its lower en which seats in a spherical seat 142. The casing is held agains't rotation by means of a depending lug 143 which is positioned between set screws 144 mounted in fixed lugs 145.

. The construction described willj'always maintain the hub and casing in effective cooperatmg relation with respect to each other.

'It s desirable that means be provided for regulatmg the pressure of the enlarged porthe hub on the control casing 127. Tlns means consists of a yoke 150 secured to the upper end of the hub 115 .and having a central opening 151 therethrough A spindle 152 is secured in the central opene upper end 153 of the yoke, a collar 154. The collar is so mounted on the tation between these members is prevented.

The lower end of the spindle is threaded into the upper end of the shaft and a spring 155 surrounds the spindle and is mounted between the collar 154 and lock nuts 156 and 157. It will be evident that the-spring 155 will exert an upward pressure against the collar and yoke, thus tending to carry a' part of the weight of the hub 115-and the parts carried thereby. If desired, the 001- .h

lar 154, spring 155 and nuts 156, 157 can be mounted on the spindle above the yoke 1,50

plurality of ports 139 disposed tracks being shown in Fi spindle that relative ro- 'iwords axially through 180 within a flange 163 of a retaining strip or fork 164. I

Each of the hollow spindles or arms 161 has secured to its outer end'a clamp bracket 165 in which. there is adjustably mounted a transfer head 166 provided with a perforated disk 167 at its u per end. The transfer head is vertically ad ustable in clams 165 to tion the transfer head a roper M istance' rom the compression die. urthermore, b loosening the clamp or collar 162, the ollow spindle 161 can be longitudinally adJusted in the sleeve 160, thus further properly positioning the transfer head to register with the compression die. During the rotation of the transfer arms from the: receiving position shown at the left in Fig. 2 to the dlscharging position shown at the right in Fi 2, the arms are also rotated axially 180. T is is accomplished by means of two sets of cams mounted osi- Trin will exert adownward p are indicated in Figs. 7 and 8 by reference 5 characters 170 and 171. Two cam tracks are provided for the two sets of cams, one of the other being shown at. 176.

It will be seen on referring to Fig. 11 that g. 11 at 175 and the the track 175 is divided into two sections 17 5A and 175B and the track 176 is also divided intotwo sections 17 6A and 176B. Further- I more, it will be evident that while one set of tracks is operating on the cams controlled thereby, the other set of tracks is not operating on its cams. The tracks 175A and 17 5B and the cams 171 which coact therewithv operate to hold the transfer head in receivin and discharging positions. The tracks 176 and 176B in conjunction with cams 17 0 operate to rotate the transfer head from receiving position to discharging position or, ,in'other Since each of the compression diesis traveling in a circular path during the transfer of the molded article to the suction heador transfer head 166 the track 17 5B is made slightly. undulating as shown in Fig. 10. As

they will bring each transfer head 166 from a diverging position relative to the compression die into a aposition approximately parallel thereto an will then move the transfer ead away from the compression die.

shows atX the transfer he Fig. 10 is more or less digfirammatie and m a position approaching the compression die, at Y the head and die are substantially parallel and in coactive relation and at Z the head is moving away from the die. At position Y where the transfer takes place the depression 67 in guide rails 65 and 66 assist in bringing the dies into close relation with the transfer heads.

The operation of the tracks 176A and 176B in turning the transfer head through 180 is roughly illustrated in Fig. 9 in which it will be seen that the tracks 176A and 176B come into operation as the cams 171 leave the guiding action of the tracks 175A and 175B. As the tracks 175A and 17513 coact with the cams 171, the transfer heads are rotated axially through 180 as shown in Fig. 9.

Thetransfer mechanism operates as follows. When the transfer heads have been properly adjusted .vertically and longitudinally 'of the axis of the rotating hub 115 to coact with the compression dies, the transfer head will be disposed beneath the compression die in receiving position as shown at the left-in Fig. 2. At this period in the cycle of operation of the transfer arm, suction will be communicated to the suction or transfer head from the suction chamber 130'through one of the ports 134, one of the grooves 135 and one of the ports 138 which in turn communicates with one of th radial openings 1%.. During the transfer operation of the molded article from the compression die to.

the transfer head, compressed air communicates with the compression die and forces the molded article away from the compression die and the suction in the transfer head will tend to assist in the transfer of the molded article; Gravity also facilitates the transfer. After the transfer head has received the molded article, the transfer arm will rotate aboutthe axis of the hub 115 and during this rotation will also rotate axially so that the head willbe-inverted to the position shown at the right of Fig. 2 when the head is positioned over a conveyor belt 180.

This belt as shown in Fig, 1 is relatively wide so that the molded articles can be de osited across the width thereof, thus rendering the machine capable of high speed operation.

Summary of operation The operation of. the complete machine may be brlefly set forth as follows. The retatlon of the forming dies in the vat containtion has removed a large proportion of the liquid or moisture from the pulp and after compression, the molded article is transferred to the compression die by means of compressed air, the compression die also being connected at this time to a source of suction.

After receiving the molded article from the forming dies, the compression dies are rotated through 180 and are also rotated pivotally to the position shown at the right in Fig. 2 or, in other words, to a position above one of the transfer heads. At this period in the cycle of operation, compressed air is introduced in back of the compression die and transfers the molded article from the compression die to the transfer head, the latter being under suction. Gravity also assists in this transfer.

After receiving the molded article from the compression dies, the transfer heads are rotated through approximately 180 and also axially to a position above the conveyor belt whereupon compressed air in "the transfer head discharges the molded articles therefrom to the conveyor belt.

When the machine is stopped for any reason the suction to the forming dies is automatically cut oil by the closing of valve 48'. If during the operation of the machine the thickness of the product or article molded ex-' ceeds a maximum limit the machine will be automatically stopped by the tripping of lever 112 which opens the motor circuit.

Although certain specific embodiments of the invention have been particularly shown and described, it will be understood that the invention is capable of modification and that changes in .the construction and in the ar rangement' of the various cooperating parts may be made without departing from the spirit or scope of the invention, as expressed in the following claims.

- What I claim is:

1. A' pulp molding machine comprising a rotatable forming die, a compression die adapted to coact therewith and separately mounted on an axis coinciding with the axis ofthe forming die and a spring-controlled pressure device engageable with the compression die to force the compression die toward the forming die. n

2. A pulp molding machine comprising a rotatable forming die, a compression die adapted to coact therewith and separately mounted on an axis coinciding with the axis of the-forming die and a spring-controlled pressure device engageable with the compression die to force the compressiorndie toward the forming die, said device compgising a block and springs forcing said block toward the compression die.

.3. A pulp molding machinehromprising a die to force the compression die toward the forming die, said device comprising a block, springs forcing said block toward the compression die, and rollers mounted on said 'ggock and engageable by said compression 4. A pulp molding machine comprising a forming die, a compression die adaptedto coact therewith and a spring-controlledpressure device engageable with the compression .die to force the compression die toward the coact therewith and a spring-controlled pressure device engageable with the compression die to force the compression die toward the forming. die, said device comprising a block and springs forcing said block towardthe compression die, a chain extending around the block and rollers carried by said chain and engageable by the compression. die.

6. 'A pulp molding machine com rising a forming die, a compression die adapted to coact therewith and a sprin -controlled pressure device engageabl'e -wit thecompression die to force the compression die toward the forming die, said device comand springs forcing said prising a block block toward th compression die. a chain extending around the block and rollers carried by said chain and engaqeable by. the compression die, and means foi driving said chain and moving the rollers across the block;

7. A pulp molding machine comprisin forming dies. and compression dies mounted independently of and laterally displaced from the forming dies and adapted to coact therewith, said compression dies being mounted for rotation about a plurality of axes at right angles to each other.

8. A pulp molding machine comprisin pulp forming dies, compression dies an I transfer mechanism, said compression dies being mounted on a carrier disposed -be-' tween said forming dies and said transfer mechanism, said compression dies being rotatable with said carrier. and relative there- 9. A pulp molding machine comprising pulp forming dies, compression dies and transfer mechanis said compression dies for movement from one side of the plane of v the carrier to the other side thereof.

10. In a pulp molding machine, a carrier, forming dies mounted thereon, a, rotatable carrier independent of said forming die carrier, and compression dies mounted on said rotatable carrier for rotation therewith and for rotation relative thereto.

'. 11. A pulp molding machine comprising pulp forming dies, compression dies and transfer mechan1sm,.sa1d compresslon (1188.

being mounted on a carrier dis ,osed between said forming dies and sai transfer mechanism, said compression dies being rotatable with said carrier and being pivoted thereon for movement from one side of theplane of the carrier to the other side thereof, and means for guiding said compression dies from a position above said'forming dies to a position above said transfer mechanism. 12. A pulp molding machine comprising pulp forming dies, .compression dies and transfer mechanism, said-compression dies 1 being -mounted on a carrier dlsposed between said forming dies and said transfer mechanism. said compression dies being ro-' tatable with said carrier and being pivoted thereon for movement from one side of the plane of the carrier to the other side there-' of, and means for guiding said compression dies from a position above said forming dies to a position above said transfer mechanism, said compression dies facing downwardly in both of said positions.

13. A pulp molding machine comprising.

pulp forming dies, compression dies and transfer mechanism, said compression dies being mounted on a carrier disposed-between said forming. dies and said transfer mechanism, said compression dies being rotatable with said carrier and being pivoted thereon for movement from'one side of the plane of the carrier to the other side thereof and on the opposite side of the axis of the carrier.

14. A pulp molding machine comprising a tank, a hub, aplurality of forming dies .carried by s'aid'hub and disposed at right angles to radii thereof, a shaft for rotating said hub, a carrier mounted on said shaft and disposed laterally of said hub, a plurality of compression dies on said carrier, and means for. moving sa1d compression dies into coactive relation with said forming dies and in a path outside of said tank.

15. A pulp molding machine comprising I a tank, a hub, a plurality of forming dies radially mounted on said hub, a shaft for rotating said hub, a carriermounted on said shaft and disposed laterally of said hub, a plurality of compression dies on said carrier, and media; for" moving -,said compression dies into oactive, substantially parallel relation wi h said forming dies and in a path disposed putside of said tank.

16. A pulp molding machine comprising a tank, a hub, a plurality of forming dies radially mounted on said hub, a shaft for rotating said hub, a carrier mounted on saidshaft and disposed laterally of said hub, a plurality of compression dies on said carrier, means for moving said compression dies into coactive relation with said forming dies and in a pathdisposed outside" of said tank, a

adapted to engage said forming and compression dies when said dies are active relation. y

18. A pulp molding machine comprising a tank, rotatable pulp forming mechanism, pulp compression dies mounted separately and spaced laterally therefrom and rotatable on an axis-coinciding with the axis of rotadisposed in' 00- tion of the'pulp forming mechanism, said compression dies being movable in a path outside of said tank and adapted to coact with said forming dies and to receive the molded material therefrom, a conveyor and means for transferring the molded articles from the compression dies to the conveyor.

.19. A pulp molding machine comprising pulp forming mechanism, pulp compression dies adapted to coact therewith in a horizontal plane and to receive the molded material therefrom, a conveyor and means for transferring the molded articles in a substantially horizontal plane fromthe compression dies to the conveyor, said transferring means comprising a plurality of transfer arms rotatable in a substantially horizontal plane.

20. A pulp molding machine comprising pulp forming mechanism, pulp compression dies adapted to coact therewithand to receive the molded material therefrom, a conveyor and means for transferring the molded articles from the compression dies to the conveyor. said transferring means co'mprising a plurality of transfer arms rotatable in a substantially horizontal plane and axially on axes disposed in saidplane.

21.' A pulp molding machine comprising pulp forming mechanism, pulp compression dies adapted to coact therewith and to receive the molded material therefrom, a conveyor and means for transferring the molded articles from the compression dies to the conveyor, said transferring means comprising a plurality of transfer arms rotatable in v a substantially horizontal plane and axially on axes disposed in said plane, said arms being movable axially through substantially and compression dies adapted to coact there-' with, both sets of said-dies being separately mounted on the same shaft and spaced laterally from each other, and means for moving said compression dies in a path outside of said tank and into coactive parallel relation to said forming dies.

A pulp molding machine comprising forming dies, and compression dies adapted to coact therewith, both sets of said dies being separately mounted on the same shaft, and means for moving said compression dies into coactive parallel relation to said forming dies in substantially horizontal planes.

24. A pulp molding machine comprising forming dies, and compression dies adapted to coact therewith, both sets of said dies being mounted 011 the same shaft, means for moving said compression dies into coactive arallel relation to said forming dies, an to a position disposed substantially parallel to said coactive position but displaced 180 therefrom.

25. A pulp molding machine comprising pulp forming dies, compression dies and transfer mechanism, said compression dies being mounted on a carrier disposed between said forming dies and said transfer mechanism, said compression dies being movable from a horizontal coactive position relative to said forming dies to a horizontal coactive position relative to said transfer mechanism 26. In a pulp molding machine, a plurality of dies, a hub, a plurality of arms secured to said hub and rotatable therewith, a transfer head secured to each arm, and means for positioning said heads upright in position to receive molded articles from said dies and means for positioning said heads inverted when the heads are disposed in discharging position.

27. In a pulp molding machine, a plurality of dies, a hub, a plurality of arms secured to said hub and rotatable therewith, a transfer head secured to each arm having 'a surface adapted to receive a molded article and adapted in one position to receive said article from a die and in another position to discharge said article, and means for positioning each of said heads in receiving position with the receiving surface at the upper end of the head and means for positioning each of said heads in discharging position with the surface disposed at the bottom thereof or inyerted 28. In a pulp molding machine, a hub, transferarms carried thereby and rotatable therewith, a perforated transfer head on each arm, a control casing disposed in abutting relation to said hub, a suction chamberg a compression chamber in said casing and ports insaid casing and in said hub adapted t establish communication between the transfor arms and said suction chamber and said compression chamber at predetermined points in the rotation of the hub and arms, and means for regulating the pressure between the abutting surfaces of the hub and control casing.

30. In a pulp molding machine, a hub, transfer. arms carried thereby and rotatable therewith, a transfer head on each arm, a control casing disposed beneath said hub and a seat for supporting said casing and hub, said seat and 'casing having coacting interengaging "spherical surfaces.

31. In a pulp molding machine, a plurality of dies, a hub, a plurality of. arms secured to said hub and rotatable therewith, a transfer head secured to each-arm, and means for creating suction in said heads when they are disposed in upright position to receive molded articles from said dies and means for creating pressure in said heads when the heads are disposed in inverted or discharging position.

32. In a pulp molding machine, a rotatable hub, aplurality'of transfer arms carried "thereby, a transfer head carriedby each arm,

said arms being axially rotatable, two sets of cams carried h each arm and a cam track controlling each set of cams in a manner to cause the axial rotation of said transfer arms as the hub is rotated.

33. In a pulp molding machine, a rotatable hub, a plurality of transfer arms carrled thereby, a transfer head carried by each arm, said arms being axially rotatable, two sets of cams carried by each arm, a plurality of dies, a cam track for holding said cams in a position to dispose the heads substantially parallel to the dies in receiving position, a cam a fer heads to a substantially horizontal re-- ceiving position adjacent the dies, and control means for guiding said dies to a sub stantially horizontal, inverted discharging position.

35. In a pulp molding machine, a plurality of dies rotatable around a horizontal axis, a.

plurality of transfer heads rotatable around a vertical axis, control means for guiding said dies and heads into juxtaposition with relation to each other and means for giving the die a sudden movement toward and away from the head.-

36. In a pulp molding machine, a plurality of" dies ro'iatable in a circular path around a horizontal axis, a plurality of transfer heads rotatable in a circular path around a vertical axis and means including cams operatively connected to said heads and an undulating cam track engageable by said cams for bringing said heads to parallel relation with respect to said dies andmoving the heads into coactive relation-with the dies and subsequently away from the dies.

37. A pulp-molding machine comprising a forming die, a compression die adapted to coact therewith and a spring-controlled pressure device engageable with 'the compression die to force the compression die toward the forming die, said device comprising positively driven ineans movable with the dies during the compressing operation.

38. A pulp molding machine comprising a forming die, a compression die adapted to coact therewith and a spring-controlled pressure device engageable with the com- 7 pression die to force the compression die toward the forming die, said device comprising positively driven, continuously operating means engageable with said compression die. 39. A pulp molding machine comprising a forming die, a compression die adapted to coact therewith and a spring-controlled pressure device engageable with the compression die to force the compression die -toward the forming die, said device comprising positively driven means movable in the direction of travel of the die and engageable therewith. 40. A pulp molding machine comprising a forming die, a compressiondie adapted to coact therewith and a spring-controlled pressure device engageable with the com'- pression die to force the compression die toward the forming die, said device comprisin means engageable with the die and movbIe therewith, said means being always 910vable in its operative position, in one direction. 41. A pulp molding machine comprising a forming die, a compression die adapted to coact therewith and a spring-controlled pressure device engageable with the compression die to force the compression die toward the forming die, said device comprising means engageable with the compression dies and successively acting springs operable on said means to force said means against the compression dies.

42; A pulp molding machine comprising a shaft, a carrier mounted thereon, a plu. rality of forming dies radially mounted on said carrier and facing away from the axis ofthecarriegandmmpxm ondiesmm a d m mm H Ml 1 H 3;, .1 an an HT- qiie EOE 1L1 said mmpImTmn diie tam/5M the forming (iie and in a mafia} a r ms relative in the fuming fie mniw.

%. A pulp mowing maeh'me wmpzrisimg a shaifi, a m riamemmteni ivhemxm, a plummliy 0f wwwcliw max-med 011 said canfier anfi t m awmv m the m the mailer, compmTm dim merumm mm a parate carrier em mifl shaft; and mfimpa'zenl mm with mid MW dies mfi m hof said m pm'm dies m said dies m mam g with m femg m far .1' 1 M ii 1M 1: fie mward the rmr n &2 and m a mfliml tion relative to the forming die mm.

46. A pulpmolafing .r a"

a came: 1 w

periphery @f the may amfi dies carried by mifi 1: ii mall mwmble into juxtaposirfim on said forming dies.

47, A pulp warming whine mmprisim w m it, a carrier mmmted fiormling mounted 0391 and w o mgemfi m {the periphm'y of the can-i amid mmpmssim dies mammal on a carrier on said? 441:}; fiflw, H 4. &8. A pulp miding machine mmpriswimg Q a carrier mummified themm, ion-wing dies 1110mm gill mn& & m-wmwi w t0 the periphery of the carrier am? mmpmsfiem dies mmmM on a semzmte camel gm mid shaftaml latemlly fiiplaced hum the forming dies anti movable into jinxfiaposifian m1 sairl iorming ies.

49. In a pulp melding micinine, a shaft, arms can-imi thereby, flaming dies mmmted on said arms, a sucfien mndmw wmnmnieating with each of said dies, am conduit communicating with each of sai dies and a part establishing immunisation iiween said condmts is! each (1E2.

50. A pulp molding machine comp w: compression eiieqmnsfer heads, and meazzs for yosifianiug said hm Maw shaft anal movable into jmapositian am said .and

dmfifiy fimm $31116 hub, fiammg (Ilium am mall "(h mm H Ema&, amnn,, means for poslhommg sand 1 heads below said wmpxmTon dies to) m the molded axfimlm r and for posittieningthemnsferhmk abawefilinem mmpmon dies, Q.

WWO! 1 :0 'v alfi u' the alt Em 52. A PREP molmg we (I mp meompimiom dies -11 =1: '11 heads m mnm fionr positioning saial dim in dmwmdfly mixing "afielivery pmifim anal means for said heads in Emmi-fly facing nmeiwnnng 1pm)- $ifim bellow mid dies.

dim m mid semmfi camiw adapted m..m@; a: with said it; M1212:

"smbsimnfially vertically above the sfimfi and a wait summfing tha lmwer mrfiqm M the ion-fining aim mar.

"55. In an pulp manidiug machine, m shaft, a mania}: thermal, fawning allies (am said mmrier, a 25mm can-1 mmm said mmpmssiom diw on said spwnd mmiir mlmpited m 1th mid forming dim; in a pmifiiam smbmmfiifly vexfii above flies shaft am! transits: A m1:- zmmiwimg the arfiicle fiom ithecomm dim in a pcsition Mow the carrim M 57. In a pulp mowing machine, a siimfit, a mrrier flmmqm, 0 @ies an smifi carrier, :1 seqpand carrier on sand shaft, mmpmssimz fies on saifi mwmn' carmier adapitad fimmafi with sai farming &%es in :1 position allis msml substantially veflimlfiy above fie sfmfi anal @MHSEEZ =z| P31 @mwm 0! arfiisrlem fmm the mmpxmian diw in a pmifiimn Em- Euw the carrier shaflband 1; a: Ry fiisylflamd a :1 tiaiiy 189 mm flue mmpmimn die receiving paitiian.

58. In a pulp meming maciiiine, a a phmlitzy of forming flias married filmmhy, a

pim afity of mmpmiam ies m mm; forming dies in a pcsitima afiww the mm H mm pression dies in a position below the shaft.

59. In a pulp molding machine, a shaft, a

plurality of forming dies carried thereby, a plurality of compression dies adapted to co act with said forming dies in a position above the shaft and transfer mechanism adapted to receive the molded articles from the compression dies in a position'below the shaft and angularly displaced substantially 180 from the compression die receiving position.

60. In a pulp molding machine, a substantially horizontal shaft, compression dies carried thereby, a second shaft disposed at right angles to said first shaft, transfer mechanism on said second shaft adapted to receive themolded articles from the compression dies, a gear on said first shaft, a gear connected to said transfer mechanism and meshing with said first gear, and means for vertically ad justing said transfer mechanism and the gear carried thereby. a

61. In a pulp molding machine, a substantially horizontal shaft, compression dies car-" ried thereby, a second shaft dis osed at right angles to said first shaft,trans er mechanism on said second shaft adapted to. receive the moldedarticles from the compression dies, a gear on said first shaft, a gear connected tfi wit said first gear, said first gear being s idable on the shaft to permit vertical movement of the transfer mechanism.

62. "Inapulp molding machine, transfer mechanism comprising a shaft, a hub mounted thereon, a suction and air control teasing disposed'below andengaging said' hub and means for adiustably supporting said huband' transfer mec anism on said shaft.

63. In a pulp molding machineftra nsfer mechanism comprising a shaft, a hub mounted thereon, a suction and air control casing disposed below and engaging said hub, andmeans for supporting said casing in a manner wherebfv'sailtil. (Easing will automatically tot e u transfer mechanism that the product will be transferred from the forming dies to the compression dies in an upward direction and will i 67. A pulp molding machine comprising a tank, pulp forming dies, compression dies.

and transfer mechanism, said compression dies being mounted on a carrier for movement in a path outside of said tank and disposed between said forming dies and said transfer mechanism, said compression dies being rotatable with said pivoted thereon.

68. A pulp molding machine comprising a tank, pulp forming dies, compression dies and transfer mechanism, said compression dies being mounted on a carrier for movement in a path outside of said tank and disposed between said forming dies and said transfer mechanism, said compression dies being rotatable with said carrier and being pivoted on pivots disposed at right angles to the axis of thecarrier. I

69. A pulp molding machine'comprisinig a tank, pulp forming dies, compression ies and transfer mechanism, said compression dies being mounted on a carrier for movement in a path outside of said tank and disv.posed, between said forming dies and said ceive the molded article from'the forming dies to a position for discharging the molded article to the transfer mechanism.

In witness whereof, I have hereunto set my handthis 9th day of October, 1926,

P. CHAPLIN.

be transferred from the compression dies to I the transfer mechanism downwardly.

65. In a pulp moldin machine, a rotary carrier, forming dies t ereon, compression dies adapted to coact therewith, and means operable in a direction substantially at rlght angles to the axis of the forming die carrier to press the compressiom dies toward the forming dies.

66. A pulp molding machine comprising a pulp tank, forming dies movable through said tank, and compression dies disposed outside of said tank and adapted to coact with arm 75 carrier and being 

